Integrated Sensing and Acting with Tunable Chemical Sensors

摘要研究目标和方法。本研究的目的是开发可调谐化学传感器主动传感的概率方法。该方法被描述为一个部分可观测的马尔可夫决策过程，由此系统采取顺序的传感动作来识别化学目标。研究人员将开发算法，以适应两种类型的情况下的传感器动态调整：目标识别和背景拒绝。这些算法将在两种可调传感器技术(金属氧化物化学电阻和红外干涉仪)上与可调预聚光器相结合进行验证。智力上的优点。主动传感在化学传感器中受到的关注很少，大多数工作都集中在离线优化上。同样，化学计量学技术假设化学物质的全谱可用。相反，这项拟议的工作认为，只需要最具信息量的波长/特征，并且应该动态地选择这些波长/特征。这项研究将导致能够根据环境动态调整传感参数的敏捷系统。这项工作还将更好地理解一系列场景中的主动感知(例如，静态与动态刺激)和传感器特性(例如，特定与交叉选择)。更广泛的影响。对于从质量控制到环境监测的许多应用，需要快速检测、识别和量化挥发性化合物。所提出的方法适用于一大类化学探测器，并可能使化学传感器的能量感知网络的发展成为可能。该项目将为本科生提供研究机会；自2001年以来，PI已经指导了45个高级设计项目，涉及140多名学生。

AbstractResearch objectives and approaches. The objective of this research is to develop probabilistic methods for active sensing with tunable chemosensors. The approach is formulated as a partially observable Markov decision process, whereby the system takes sequential sensing actions to identify a chemical target. The investigators will develop algorithms to adapt sensor tunings on-the-fly for two types of scenario: target discrimination and background rejection. These algorithms will be validated on two tunable sensor technologies (metal-oxide chemoresistors and infrared interferometers) combined with tunable preconcentrators. Intellectual merit. Active sensing has received minimal attention in chemosensors, where most work has focused on off-line optimization. Likewise, chemometrics techniques assume that a full spectrum of the chemical is available. In contrast, the proposed work argues that only the most informative wavelengths/features are needed, and that these should be selected dynamically. This research will lead to agile systems that can adapt sensing parameters on-the-fly in response to their environments. The work will also provide a better understanding of active sensing across a range of scenarios (e.g. static vs. dynamic stimuli) and sensor characteristics (e.g. specific vs. cross-selective). Broader impacts. For a number of applications, from quality control to environmental monitoring, there is a need to rapidly detect, identify and quantify volatile compounds. The proposed methodology generalizes to a large class of chemical detectors, and may enable the development of power-aware networks of chemical sensors. The project will provide research opportunities for undergraduate students; since 2001, the PI has supervised 45 senior-design projects involving over 140 students.